Answer:
<em><u>Instinctive</u></em>
Explanation:
The question precises that it is a baby bird and such behaviour are being acquired from birth they are not being learned. Similarly a human mother doesn't teach her baby her to suck her nipples, it is "in born".
Explanation:
anaerobic respiration would be used when the body has inefficient of
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I am mostly sure the answer is B. Good luck, and sorry if it's wrong! :(